Lock box



FIG. 1 is a top, front and side perspective view of a first embodiment of a lock box embodying my new design;

FIG. 2 is a bottom, front and side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

Broken lines are used to illustrate features of the lock box which form no part of the claimed design. 

CLAIM The ornamental design for a lock box, as shown and described. 